/ Thesaurus / L Synonyms of leatherjack Find synonyms for: Noun1. leatherjacket, leatherjack, jackusage: any of several New World tropical fishes having tiny embedded scalesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language